Patents by Inventor Roland Kuhnert

Roland Kuhnert has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4241866
    Abstract: To gently stop a centrifuge, particularly for use in blood transfusion procedures including plasmapheresis, a centrifuge motor is first braked by reverse current application with high braking torque, to reduce the speed thereof from operating speed to less than 1000 rpm, for example between 800 to 500 rpm; and then braked under dynamic braking conditions, preferably under continuously variable torque conditions, until it is about stopped, for example at close to 50 rpm, and then permit it to coast to a stop. The braking is effected gently and can be achieved from a nominal speed of 6000 rpm to stopped condition in about 2 minutes, thus permitting blood centrifuging for plasmapheresis in about 8 minutes.
    Type: Grant
    Filed: May 18, 1979
    Date of Patent: December 30, 1980
    Assignee: Heraeus Christ GmbH
    Inventors: Frank Giesbert, Roland Kuhnert